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Operating Systems Linux Ubuntu i am new to opengl , how to work opengl in ubuntu Post 302349140 by Ravikishore on Monday 31st of August 2009 07:58:40 AM
Old 08-31-2009
Hi Sir,

I worked with c programs in ubuntu for openGL,,, now im trying to execute the c++ programs for openGL ,,,, while compiling its showing error message as

root@lxdevenv:/usr/include/GL# g++ -c -I$QTDIR/include ravvv.cpp
ravvv.cpp:1:18: error: kapp.h: No such file or directory
ravvv.cpp:2:24: error: qwidget.h: No such file or directory
ravvv.cpp:3:75: error: qpainter.h: No such file or directory
ravvv.cpp:4:23: error: qimage.h: No such file or directory
ravvv.cpp:7: error: expected class-name before ‘{’ token
ravvv.cpp:8: error: expected `}' at end of input
ravvv.cpp:8: error: expected unqualified-id at end of input
root@lxdevenv:/usr/include/GL#


and my code is

#include <kapp.h>
#include <qwidget.h>
#include <qpainter.h> // The QPainter class draws graphics on widgets.
#include <qimage.h>

class MyWindow : public QWidget
{
public:
// Constructor for the window, just call the QWidget constructor
MyWindow() : QWidget() { }
protected:
void paintEvent(QPaintEvent *);
};

// This function is called when the window area must be updated.
// Load and view the image
void MyWindow:SmilieaintEvent(QPaintEvent *ev)
{
// Load the image that we want to show
QImage image;
if (image.load("test.jpg", 0)) // If the image was loaded,
{ // Show the image.
// Draw graphics in this window
QPainter paint(this);
// Draw the image we loaded on the window
paint.drawImage(0, 0, image, 0, 0,
image.width(), image.height());
}
}


int main(int argc, char **argv)
{
KApplication app(argc, argv)
// Create the window
MyWindow window;
app.setMainWidget(&window);
window.setCaption("ImageIO Example");
window.setGeometry(100,100,300,300);
window.show();
return app.exec();
}


guide me ..it will appreciated ....
 

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QNPWidget(3qt)															    QNPWidget(3qt)

NAME
QNPWidget - QWidget that is a web browser plugin window SYNOPSIS
This class is part of the Qt Netscape Extension. #include <qnp.h> Inherits QWidget. Public Members QNPWidget () ~QNPWidget () virtual void enterInstance () virtual void leaveInstance () QNPInstance * instance () DESCRIPTION
This class is defined in the Qt Netscape Extension, which can be found in the qt/extensions directory. It is not included in the main Qt API. The QNPWidget class provides a QWidget that is a web browser plugin window. Derive from QNPWidget to create a widget that can be used as a web browser plugin window, or create one and add child widgets. Instances of QNPWidget may only be created when QNPInstance::newWindow() is called by the browser. A common way to develop a plugin widget is to develop it as a stand-alone application window, then make it a child of a plugin widget to use it as a browser plugin. The technique is: class MyPluginWindow : public QNPWidget { QWidget* child; public: MyPluginWindow() { // Some widget that is normally used as a top-level widget child = new MyIndependentlyDevelopedWidget(); // Use the background color of the web page child->setBackgroundColor( backgroundColor() ); // Fill the plugin widget child->setGeometry( 0, 0, width(), height() ); } void resizeEvent(QResizeEvent*) { // Fill the plugin widget child->resize(size()); } }; The default implementation is an empty window. MEMBER FUNCTION DOCUMENTATION
QNPWidget::QNPWidget () Creates a QNPWidget. QNPWidget::~QNPWidget () Destroys the window. This will be called by the plugin binding code when the window is no longer required. The web browser will delete windows when they leave the page. The bindings will change the QWidget::winId() of the window when the window is resized, but this should not affect normal widget behavior. void QNPWidget::enterInstance () [virtual] Called when the mouse enters the plugin window. Does nothing by default. Example: grapher/grapher.cpp. QNPInstance * QNPWidget::instance () Returns the instance for which this widget is the plugin window. void QNPWidget::leaveInstance () [virtual] Called when the mouse leaves the plugin window. Does nothing by default. Example: grapher/grapher.cpp. SEE ALSO
http://doc.trolltech.com/qnpwidget.html http://www.trolltech.com/faq/tech.html COPYRIGHT
Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the license file included in the distribution for a complete license statement. AUTHOR
Generated automatically from the source code. BUGS
If you find a bug in Qt, please report it as described in http://doc.trolltech.com/bughowto.html. Good bug reports help us to help you. Thank you. The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech. If you find errors in this manual page, please report them to qt-bugs@trolltech.com. Please include the name of the manual page (qnpwidget.3qt) and the Qt version (3.3.8). Trolltech AS 2 February 2007 QNPWidget(3qt)
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